18993920

素因数分解:

$2^8\times 5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1$

素因数の和:122

約数の個数: 144

約数和(自身を含む): 52980480

約数和(自身を除く): 33986560

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 19, 20, 22, 32, 38, 40, 44, 55, 64, 71, 76, 80, 88, 95, 110, 128, 142, 152, 160, 176, 190, 209, 220, 256, 284, 304, 320, 352, 355, 380, 418, 440, 568, 608, 640, 704, 710, 760, 781, 836, 880, 1045, 1136, 1216, 1280, 1349, 1408, 1420, 1520, 1562, 1672, 1760, 2090, 2272, 2432, 2698, 2816, 2840, 3040, 3124, 3344, 3520, 3905, 4180, 4544, 4864, 5396, 5680, 6080, 6248, 6688, 6745, 7040, 7810, 8360, 9088, 10792, 11360, 12160, 12496, 13376, 13490, 14080, 14839, 15620, 16720, 18176, 21584, 22720, 24320, 24992, 26752, 26980, 29678, 31240, 33440, 43168, 45440, 49984, 53504, 53960, 59356, 62480, 66880, 74195, 86336, 90880, 99968, 107920, 118712, 124960, 133760, 148390, 172672, 199936, 215840, 237424, 249920, 267520, 296780, 345344, 431680, 474848, 499840, 593560, 863360, 949696, 999680, 1187120, 1726720, 1899392, 2374240, 3798784, 4748480, 9496960, 18993920]

約数ペア:

[(1, 18993920), (2, 9496960), (4, 4748480), (5, 3798784), (8, 2374240), (10, 1899392), (11, 1726720), (16, 1187120), (19, 999680), (20, 949696), (22, 863360), (32, 593560), (38, 499840), (40, 474848), (44, 431680), (55, 345344), (64, 296780), (71, 267520), (76, 249920), (80, 237424), (88, 215840), (95, 199936), (110, 172672), (128, 148390), (142, 133760), (152, 124960), (160, 118712), (176, 107920), (190, 99968), (209, 90880), (220, 86336), (256, 74195), (284, 66880), (304, 62480), (320, 59356), (352, 53960), (355, 53504), (380, 49984), (418, 45440), (440, 43168), (568, 33440), (608, 31240), (640, 29678), (704, 26980), (710, 26752), (760, 24992), (781, 24320), (836, 22720), (880, 21584), (1045, 18176), (1136, 16720), (1216, 15620), (1280, 14839), (1349, 14080), (1408, 13490), (1420, 13376), (1520, 12496), (1562, 12160), (1672, 11360), (1760, 10792), (2090, 9088), (2272, 8360), (2432, 7810), (2698, 7040), (2816, 6745), (2840, 6688), (3040, 6248), (3124, 6080), (3344, 5680), (3520, 5396), (3905, 4864), (4180, 4544)]